A man of mass m stands at one end

Asked by admin @ 17/08/2021 in Physics viewed by 300 People

A man of mass M stands at one end of a plank of length L of mass m that rests on a smooth horizontal surface. If the man walks to the other end of the plank, the plank displaces by:

Answered by admin @ 17/08/2021

Answer:

Let distance moved by the planck be x, then wrt ground the man will move by a distance L−x

Now the net displacement of the centre of mass will be zero in ground frame

M(L−x)=M∗x/3

x=3∗L/4

(L−x)=L/4

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